ABB relays, including the CR series of interface relays and the Relion family of protection relays, are engineered for robust performance in demanding industrial environments such as manufacturing, power distribution, and automation. These devices provide essential functions like voltage conversion, current monitoring, and fault detection, with features including overload-proof designs, IP67-rated housings for harsh conditions, and support for up to 4 contacts in compact modules. Available in single-function (e.g., CM-SRS.xx for over/under-current monitoring) and multifunctional variants, they integrate seamlessly with PLCs, iPCs, and field bus systems, ensuring safe signal switching and isolation. Key applications include pump protection, earth-fault detection, and time-delay operations, with certifications for SIL 2/3 safety and compliance with IEC 61508. ABB’s relays feature low power consumption (max 15 mA), wide coil voltages (13 options), and built-in self-supervision for diagnostics, making them ideal for reliable operation in factories, data centers, and utility networks, backed by decades of innovation since the first microprocessor-based relay in 1985.